I've been looking over this site for a week or so. I tried out Hassayampa Canyon on Saturday and some of the waypoints were off. I used Motion X GPS to key in some waypoints beforehand and it pinned a few farther north then actual trail. Could be app(doubt it) or when guy tagged location it was off due to canyon. Either way good trail info, but if you are relying on waypoints for less traveled trails be careful.